Music-sheet-guiding device.



has been connected with the Winding-roll 3. and the apparatus put inmotion, it is evi-' dent that the sheet will be drawn over the tracker 2to effect the playing of the instrumeat. It will be seen that the edgeof the sheet passes between the :hilurcate sides of the block 43. itwill also be seen that the pneumatic 23 tends by its expansion to forcethe music-sheet 8 to the left of-the'drawing Fig. l, which tendency isopposed by H e light spring 23*. if at any time the slr. eet 8 should beforced too much to tl e left, its edge will bear against the block 43,so as to turn the lever 40 on its pivot 41 and raise the valve 37 fromits seat 36. Air under pres- Inatic to iexh aust to atmosphere. "sprang23* then acts to draw the music-sheet sure from the chamber 1 will thenpass through thevalve-ch amber 35 and tube 34 to raise the-diaphragm 33and move the valve 32 from the position shown in Fig. l of the drawings,so as to connect the tube 30 with the pressure-chamber 31. This in turndepresses the diaphragm 29 and acts, through the lever 28 to raise thevalve 26. Tl. is cuts oil" connection between the pressure chamher 25and pneumatic 23 and pernuts tle pneu- Tl e 8 to the sight of thedrawing Fig. :1. It is understood that in practice these lateralmovements of the music-sheet 8 are very slight and are repeated as oftenas is necessary to insure movement-of a music-sh set in its'truepathouer the tracker 2. lnordinary cases the alternate expansions andcontractions of the pneumatic 23 will be very slight, amounting to amore wavering of the finger 22 suilicient, however, to hold themusicsheet 8 in its correct alineinentthat is, in correct transverserelation to its path or" movement.

It is obvious that very many mechanical changes may be made in the formof my in vention without departing from its spirit. It is also clearthat While I have shown the instrument as actuated by pressure abovethat of atmosphere, it would require only such knowledge as is possessedby any one skilled in the art to make the necesssary mechanical. changesfor adapting it to an instrument operated by suction.

W hat I claim isl. A music-sheet-guiding device comprising meansnormally operative to move the including a part bearin senses a sheetlaterally in one-direction, and means v against an edge of the sheet andmovable laterally thereby for governing said sheetsrnoving means.

2. A musicsheet-guididevice comprising pneumatically actuate means'fo1"n1ov 'ing the sheet laterally, a movable part against which thesheet bears when laterally deflected from its path, and connectionsbetween said movable part and said moving means for controlling thelatter said connections including a pnesrnatic valve moved by said part.

' 3. A music-sheetguiding device comprising means normally operative tomove the sheet laterally in one dniection, a movable part a ainstlwhichthe sheet hears when.

moved by said means from its :path, and connections between said movablepart and said sheet-moving means for controlling the latter.

4. A music slieet-guiding device comprising means including anactuating-pneumatic and suitable connections for moving the sheet jlaterally, and means including :a, movable part against which the sheetbears when de-' ilected from its path and a valve connected to saidmovable past, and pneumatic-connections between said valve and saidactuatingpneumatic'for governing the latter.

5. A enusic-sheet-guiding device comprisi a tracker, longitudinallymovable musicro' l-supporrting shafts at each side of said tracker,pneumatically actuated means for longitudinally moving said shaftssimultaneously and equally, a partbearing ainst an edge off themusic-sheet and movab e late erally thereby, and a pneumatic valve movedby said part for governing said shaft-moving means.

'6. A music-sheet-guiding device comprisv a tracker,longitudinally-movable musicrorl-supporting shafts at each side of saidtracker, springs for pressing said shafts longitudinally in the samedirection, pneumatically-actuated means for longitudinally snow.

ELTHU rrionson.

Witnesses Bonner Sea-on.

HENaY O. Wnsrnnoane.

